How to accomplish realistic piles of dirt in Blender?
The addon you are talking about is probably Molecular (Sand sim with Molecular)
Simulating everything will take a beefy PC and huge amounts of simulation time, and will only look good if you got the settings right before hand, but if you do its very rewarding.
You maybe want to look into techniques like
Particle Dirt

Particle Dirt

Displacement and bump mapping with PBR textures

Displacement and bump mapping

Even tessellation / Micro Displacement (adaptive subdivision)

Sculpting


To shorten your time and gain more control